1 /* 2 * Wireless configuration interface internals. 3 * 4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> 5 */ 6 #ifndef __NET_WIRELESS_CORE_H 7 #define __NET_WIRELESS_CORE_H 8 #include <linux/mutex.h> 9 #include <linux/list.h> 10 #include <linux/netdevice.h> 11 #include <linux/kref.h> 12 #include <linux/rbtree.h> 13 #include <linux/debugfs.h> 14 #include <linux/rfkill.h> 15 #include <linux/workqueue.h> 16 #include <net/genetlink.h> 17 #include <net/cfg80211.h> 18 #include "reg.h" 19 20 struct cfg80211_registered_device { 21 const struct cfg80211_ops *ops; 22 struct list_head list; 23 /* we hold this mutex during any call so that 24 * we cannot do multiple calls at once, and also 25 * to avoid the deregister call to proceed while 26 * any call is in progress */ 27 struct mutex mtx; 28 29 /* rfkill support */ 30 struct rfkill_ops rfkill_ops; 31 struct rfkill *rfkill; 32 struct work_struct rfkill_sync; 33 34 /* ISO / IEC 3166 alpha2 for which this device is receiving 35 * country IEs on, this can help disregard country IEs from APs 36 * on the same alpha2 quickly. The alpha2 may differ from 37 * cfg80211_regdomain's alpha2 when an intersection has occurred. 38 * If the AP is reconfigured this can also be used to tell us if 39 * the country on the country IE changed. */ 40 char country_ie_alpha2[2]; 41 42 /* If a Country IE has been received this tells us the environment 43 * which its telling us its in. This defaults to ENVIRON_ANY */ 44 enum environment_cap env; 45 46 /* wiphy index, internal only */ 47 int wiphy_idx; 48 49 /* associate netdev list */ 50 struct mutex devlist_mtx; 51 /* protected by devlist_mtx or RCU */ 52 struct list_head netdev_list; 53 int devlist_generation; 54 int opencount; /* also protected by devlist_mtx */ 55 wait_queue_head_t dev_wait; 56 57 /* BSSes/scanning */ 58 spinlock_t bss_lock; 59 struct list_head bss_list; 60 struct rb_root bss_tree; 61 u32 bss_generation; 62 struct cfg80211_scan_request *scan_req; /* protected by RTNL */ 63 unsigned long suspend_at; 64 struct work_struct scan_done_wk; 65 66 #ifdef CONFIG_NL80211_TESTMODE 67 struct genl_info *testmode_info; 68 #endif 69 70 struct work_struct conn_work; 71 struct work_struct event_work; 72 73 /* must be last because of the way we do wiphy_priv(), 74 * and it should at least be aligned to NETDEV_ALIGN */ 75 struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN))); 76 }; 77 78 static inline 79 struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy) 80 { 81 BUG_ON(!wiphy); 82 return container_of(wiphy, struct cfg80211_registered_device, wiphy); 83 } 84 85 /* Note 0 is valid, hence phy0 */ 86 static inline 87 bool wiphy_idx_valid(int wiphy_idx) 88 { 89 return wiphy_idx >= 0; 90 } 91 92 93 extern struct workqueue_struct *cfg80211_wq; 94 extern struct mutex cfg80211_mutex; 95 extern struct list_head cfg80211_rdev_list; 96 extern int cfg80211_rdev_list_generation; 97 98 static inline void assert_cfg80211_lock(void) 99 { 100 lockdep_assert_held(&cfg80211_mutex); 101 } 102 103 /* 104 * You can use this to mark a wiphy_idx as not having an associated wiphy. 105 * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL 106 */ 107 #define WIPHY_IDX_STALE -1 108 109 struct cfg80211_internal_bss { 110 struct list_head list; 111 struct rb_node rbn; 112 unsigned long ts; 113 struct kref ref; 114 atomic_t hold; 115 bool beacon_ies_allocated; 116 bool proberesp_ies_allocated; 117 118 /* must be last because of priv member */ 119 struct cfg80211_bss pub; 120 }; 121 122 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub) 123 { 124 return container_of(pub, struct cfg80211_internal_bss, pub); 125 } 126 127 static inline void cfg80211_ref_bss(struct cfg80211_internal_bss *bss) 128 { 129 kref_get(&bss->ref); 130 } 131 132 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss) 133 { 134 atomic_inc(&bss->hold); 135 } 136 137 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss) 138 { 139 int r = atomic_dec_return(&bss->hold); 140 WARN_ON(r < 0); 141 } 142 143 144 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx); 145 int get_wiphy_idx(struct wiphy *wiphy); 146 147 struct cfg80211_registered_device * 148 __cfg80211_rdev_from_info(struct genl_info *info); 149 150 /* 151 * This function returns a pointer to the driver 152 * that the genl_info item that is passed refers to. 153 * If successful, it returns non-NULL and also locks 154 * the driver's mutex! 155 * 156 * This means that you need to call cfg80211_unlock_rdev() 157 * before being allowed to acquire &cfg80211_mutex! 158 * 159 * This is necessary because we need to lock the global 160 * mutex to get an item off the list safely, and then 161 * we lock the rdev mutex so it doesn't go away under us. 162 * 163 * We don't want to keep cfg80211_mutex locked 164 * for all the time in order to allow requests on 165 * other interfaces to go through at the same time. 166 * 167 * The result of this can be a PTR_ERR and hence must 168 * be checked with IS_ERR() for errors. 169 */ 170 extern struct cfg80211_registered_device * 171 cfg80211_get_dev_from_info(struct genl_info *info); 172 173 /* requires cfg80211_rdev_mutex to be held! */ 174 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx); 175 176 /* identical to cfg80211_get_dev_from_info but only operate on ifindex */ 177 extern struct cfg80211_registered_device * 178 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex); 179 180 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, 181 struct net *net); 182 183 static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev) 184 { 185 mutex_lock(&rdev->mtx); 186 } 187 188 static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev) 189 { 190 BUG_ON(IS_ERR(rdev) || !rdev); 191 mutex_unlock(&rdev->mtx); 192 } 193 194 static inline void wdev_lock(struct wireless_dev *wdev) 195 __acquires(wdev) 196 { 197 mutex_lock(&wdev->mtx); 198 __acquire(wdev->mtx); 199 } 200 201 static inline void wdev_unlock(struct wireless_dev *wdev) 202 __releases(wdev) 203 { 204 __release(wdev->mtx); 205 mutex_unlock(&wdev->mtx); 206 } 207 208 #define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx) 209 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx) 210 211 enum cfg80211_event_type { 212 EVENT_CONNECT_RESULT, 213 EVENT_ROAMED, 214 EVENT_DISCONNECTED, 215 EVENT_IBSS_JOINED, 216 }; 217 218 struct cfg80211_event { 219 struct list_head list; 220 enum cfg80211_event_type type; 221 222 union { 223 struct { 224 u8 bssid[ETH_ALEN]; 225 const u8 *req_ie; 226 const u8 *resp_ie; 227 size_t req_ie_len; 228 size_t resp_ie_len; 229 u16 status; 230 } cr; 231 struct { 232 u8 bssid[ETH_ALEN]; 233 const u8 *req_ie; 234 const u8 *resp_ie; 235 size_t req_ie_len; 236 size_t resp_ie_len; 237 } rm; 238 struct { 239 const u8 *ie; 240 size_t ie_len; 241 u16 reason; 242 } dc; 243 struct { 244 u8 bssid[ETH_ALEN]; 245 } ij; 246 }; 247 }; 248 249 struct cfg80211_cached_keys { 250 struct key_params params[6]; 251 u8 data[6][WLAN_MAX_KEY_LEN]; 252 int def, defmgmt; 253 }; 254 255 256 /* free object */ 257 extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev); 258 259 extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, 260 char *newname); 261 262 void ieee80211_set_bitrate_flags(struct wiphy *wiphy); 263 void wiphy_update_regulatory(struct wiphy *wiphy, 264 enum nl80211_reg_initiator setby); 265 266 void cfg80211_bss_expire(struct cfg80211_registered_device *dev); 267 void cfg80211_bss_age(struct cfg80211_registered_device *dev, 268 unsigned long age_secs); 269 270 /* IBSS */ 271 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 272 struct net_device *dev, 273 struct cfg80211_ibss_params *params, 274 struct cfg80211_cached_keys *connkeys); 275 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev, 276 struct net_device *dev, 277 struct cfg80211_ibss_params *params, 278 struct cfg80211_cached_keys *connkeys); 279 void cfg80211_clear_ibss(struct net_device *dev, bool nowext); 280 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 281 struct net_device *dev, bool nowext); 282 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev, 283 struct net_device *dev, bool nowext); 284 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid); 285 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, 286 struct wireless_dev *wdev); 287 288 /* MLME */ 289 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 290 struct net_device *dev, 291 struct ieee80211_channel *chan, 292 enum nl80211_auth_type auth_type, 293 const u8 *bssid, 294 const u8 *ssid, int ssid_len, 295 const u8 *ie, int ie_len, 296 const u8 *key, int key_len, int key_idx, 297 bool local_state_change); 298 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 299 struct net_device *dev, struct ieee80211_channel *chan, 300 enum nl80211_auth_type auth_type, const u8 *bssid, 301 const u8 *ssid, int ssid_len, 302 const u8 *ie, int ie_len, 303 const u8 *key, int key_len, int key_idx, 304 bool local_state_change); 305 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 306 struct net_device *dev, 307 struct ieee80211_channel *chan, 308 const u8 *bssid, const u8 *prev_bssid, 309 const u8 *ssid, int ssid_len, 310 const u8 *ie, int ie_len, bool use_mfp, 311 struct cfg80211_crypto_settings *crypt); 312 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 313 struct net_device *dev, struct ieee80211_channel *chan, 314 const u8 *bssid, const u8 *prev_bssid, 315 const u8 *ssid, int ssid_len, 316 const u8 *ie, int ie_len, bool use_mfp, 317 struct cfg80211_crypto_settings *crypt); 318 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 319 struct net_device *dev, const u8 *bssid, 320 const u8 *ie, int ie_len, u16 reason, 321 bool local_state_change); 322 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, 323 struct net_device *dev, const u8 *bssid, 324 const u8 *ie, int ie_len, u16 reason, 325 bool local_state_change); 326 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, 327 struct net_device *dev, const u8 *bssid, 328 const u8 *ie, int ie_len, u16 reason, 329 bool local_state_change); 330 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, 331 struct net_device *dev); 332 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 333 const u8 *req_ie, size_t req_ie_len, 334 const u8 *resp_ie, size_t resp_ie_len, 335 u16 status, bool wextev, 336 struct cfg80211_bss *bss); 337 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid, 338 u16 frame_type, const u8 *match_data, 339 int match_len); 340 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid); 341 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev); 342 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, 343 struct net_device *dev, 344 struct ieee80211_channel *chan, 345 enum nl80211_channel_type channel_type, 346 bool channel_type_valid, 347 const u8 *buf, size_t len, u64 *cookie); 348 349 /* SME */ 350 int __cfg80211_connect(struct cfg80211_registered_device *rdev, 351 struct net_device *dev, 352 struct cfg80211_connect_params *connect, 353 struct cfg80211_cached_keys *connkeys, 354 const u8 *prev_bssid); 355 int cfg80211_connect(struct cfg80211_registered_device *rdev, 356 struct net_device *dev, 357 struct cfg80211_connect_params *connect, 358 struct cfg80211_cached_keys *connkeys); 359 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev, 360 struct net_device *dev, u16 reason, 361 bool wextev); 362 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 363 struct net_device *dev, u16 reason, 364 bool wextev); 365 void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid, 366 const u8 *req_ie, size_t req_ie_len, 367 const u8 *resp_ie, size_t resp_ie_len); 368 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev, 369 struct wireless_dev *wdev); 370 371 void cfg80211_conn_work(struct work_struct *work); 372 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev); 373 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev); 374 375 /* internal helpers */ 376 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 377 struct key_params *params, int key_idx, 378 bool pairwise, const u8 *mac_addr); 379 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 380 size_t ie_len, u16 reason, bool from_ap); 381 void cfg80211_sme_scan_done(struct net_device *dev); 382 void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len); 383 void cfg80211_sme_disassoc(struct net_device *dev, int idx); 384 void __cfg80211_scan_done(struct work_struct *wk); 385 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak); 386 void cfg80211_upload_connect_keys(struct wireless_dev *wdev); 387 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 388 struct net_device *dev, enum nl80211_iftype ntype, 389 u32 *flags, struct vif_params *params); 390 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev); 391 392 struct ieee80211_channel * 393 rdev_freq_to_chan(struct cfg80211_registered_device *rdev, 394 int freq, enum nl80211_channel_type channel_type); 395 int cfg80211_set_freq(struct cfg80211_registered_device *rdev, 396 struct wireless_dev *wdev, int freq, 397 enum nl80211_channel_type channel_type); 398 399 u16 cfg80211_calculate_bitrate(struct rate_info *rate); 400 401 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS 402 #define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond) 403 #else 404 /* 405 * Trick to enable using it as a condition, 406 * and also not give a warning when it's 407 * not used that way. 408 */ 409 #define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; }) 410 #endif 411 412 #endif /* __NET_WIRELESS_CORE_H */ 413